have (got) one's head screwed on right (или the right way)

Mrs. Bessie had her head screwed on the right way, there was no denying it, although why she married Ted Watt no one could imagine. (K. S. Prichard, ‘Coonardoo’, ch. II) — Нельзя отрицать, что миссис Бесси - женщина с головой, хотя и непонятно, как она могла выйти замуж за Теда Уотта.

But she's got her head screwed on, has Kitty. She'll be careful, she won't let the police get hold of her again. (C. P. Snow, ‘The Sleep of Reason’, ch. 29) — У Китти голова хорошо варит. Она больше не попадет в руки полиции.